RaspberryBASIC.org Forum

[AIR]

It's a Swift issue, because it's slow on my Mac too.

[John]

It seems fast on my Lenovo laptop (Ubuntu / Windows) and the Swift Online Playground. It's only a dog on the RPi.

String / Array Language Challenge Results

I'm also viewing ScriptBasic in a different light. I will use it for prototyping and one off tasks but will use something else (Nim?) for deliverables.

[AIR]

GoLang as tested really bothered me, so I rewrote an optimized version:

Code: Go

1. package main
2.  
3. import (
4.     "fmt"
5.     "strings"
6. )
7.  
8. // Reverse returns its argument string reversed rune-wise left to right.
9. // From: https://github.com/golang/example/blob/master/stringutil/reverse.go
10. func Reverse(s string) string {
11.     r := []rune(s)
12.     for i, j := 0, len(r)-1; i < len(r)/2; i, j = i+1, j-1 {
13.         r[i], r[j] = r[j], r[i]
14.     }
15.     return string(r)
16. }
17.  
18. func main() {
19.     var s strings.Builder
20.     var r = ""
21.     var t strings.Builder
22.     var a [1000001]int
23.  
24.     for x := 0; x < 1000001; x++ {
25.         a[x] = x
26.  
27.         s.WriteByte(byte((x % 26) + 65))
28.  
29.         if s.Len() == 26 {
30.             t.WriteString(s.String())
31.             s.Reset()
32.         }
33.     }
34.  
35.     r = Reverse(t.String())
36.  
37.     fmt.Println("r LEN: ", len(r))
38.     fmt.Println("Front: ", r[0:26])
39.     fmt.Println("Back:  ", r[len(r)-26:])
40.     fmt.Println("UBVal: ", a[1000000])
41.  
42. }

On my RPI 3B+, using GO version 1.13.4:

riveraa@dpi:~/Projects/go/1mil3 $ go build
riveraa@dpi:~/Projects/go/1mil3 $ time ./1mil3
r LEN:  999986
Front:  ZYXWVUTSRQPONMLKJIHGFEDCBA
Back:   ZYXWVUTSRQPONMLKJIHGFEDCBA
UBVal:  1000000

real    0m0.222s
user    0m0.230s
sys    0m0.021s

BTW, I picked up a RPI 4B (4G) this evening, but haven't set it up yet.

AIR.

[John]

I'll rerun the GO submission and update the chart.

Congrats on the addition to your family.

GO code and charts updated.

Trifecta + 1 for you. 

[John]

I downloaded and installed BaCon 3.9.3 that was recently release and was suppose to have string handling improvements. No change from the previous BaCon run and it still can't integrate with the FLTK BaConGUI  for the RPi.

[John]

One thing I noticed doing this string/array challenge is how similar basic syntax is among the languages.

Maybe a fun project might be is to create a universal language syntax translator. Sort of like Google translate but for computer languages.

There seems to be an abundance of BASIC to C translators.

@AIR: I still think your JADE C++ effort has promise. Is there a language reference guide or looking at examples it?

 

[AIR]

examples, and PROTOTYPES.txt / KEYWORDS.txt
BTW, what distro are you running?  The standard "time" binary doesn't match what you're running.  Is that part of the distro or some 3rd party binary?Nevermind, found it.

[John]

The new time format was suggested by @ejolson on the RPi forum. This doesn't disable the time function we are use to. I'm thinking of renaming it to timex so I don't have to use the full path each time.

[AIR]

So which distro and sd card are you using?  I'm using DietPi with a seemingly crappy Kingston 64 Gb card that claims 80MB/s but I'm no where near that in testing.

[John]

I started off with the default Raspian Buster but after doing an update of the OS the default file manager stopped working. I installed Nautalus and gEdit and to my surprise I'm now running the LXDE desktop. I like the multiple desktops (2) and clean lightweight GUI.

I'm using a Sandisk Extreme 256 GB SD. ($44 for 2 at Costco)

[John]

I  thought I  would recompile scriba in single threaded mode and not use Peter's MyAlloc memory manager. As it turns out, it's shade slower and still a memory hog. I guess the only advantage of single threaded mode is you can access ScriptBasic's variable prointers directly and use standard alloc for memory allocation.


pi@RPi4B:~/sbrt/examples $ timex sbsu 1mil3.sb
r LEN: 999986
Front: ZYXWVUTSRQPONMLKJIHGFEDCBA
Back:  ZYXWVUTSRQPONMLKJIHGFEDCBA
UBVal: 1000000
16.74user 34.57system 0:51.34elapsed 99%CPU (0avgtext+0avgdata 172592maxresident)k
8inputs+0outputs (0major+4122824minor)pagefaults 0swaps
pi@RPi4B:~/sbrt/examples $

[John]

What are your thoughts about this stringbuilder library for C. I wonder if it would be worth making an extension module out of it.

[AIR]

The only advantage I see is that it *might* work on Windows.


Otherwise, I would just use open_memstream.

Here is their sample code redone using open_memstream:

Code: C

1. #include <stdlib.h>
2. #include <stdio.h>
3. #include <string.h>
4.  
5. int main(int argc, char *argv[])
6. {
7.     int                i = 0;
8.     size_t          len;
9.     char            *str = NULL;
10.     FILE            *sb;
11.  
12.     sb = open_memstream(&str,&len);
13.  
14.     for (i = 1; i < argc; i++) {
15.         if (1 < i)
16.             fprintf(sb,"%s", "->");
17.         fprintf(sb, "[%s]", argv[i]);
18.         puts(str);
19.     }
20.  
21.     fclose(sb);
22.     free(str);
23. }

AIR.

[John]

Thanks AIR for checking it out. Hope you're happy with your new RPi 4B 4GB.

[John]

I installed on Windows B4J (Basic for Java) which is free. It has a great IDE and an easy to use BASIC. The generated Java class code should run on the RPi and other platforms. One step closer to Java. I'm not trying to follow Peter's path but it happens to be the resulting language for B4J.